Woodcut portrait of Martin Luther, 1546This coloured woodcut portrait was forwarded in a letter from John Dymock, dated at Bremen, 23 July 1546, in which he says:- "I do send yow a provysye" (prophecy) "made be Martyn Luther in his latter dayes".The really "revolutionary" aspect of the new printing presses was that they used moveable type. Printing with blocks had been used for centuries but type could now be used again and again. As a result, printed documents were much cheaper to produce than manuscripts and reached a far wider audience.